Practice: Exponential Functions

A new savings account is opened with $400 and gains 3% every year. How much money will be in the account after 10 years?

• y =400(4)¹⁰

• y =400(0.97)¹⁰

• y =400(1.03)¹⁰

• y =400(0.03)¹⁰

What is a, the starting term, for the function: 6500 = 300(1.16)^x?

• 300

• 1.16

• x

• 6500

The following function represents a bank account.

g(x) = 200(1.25)⁵

What was the initial dollar amount put in the bank?

• $200

• $1.25

• $0.25

• $5.00

Ty's house is worth $100,000 right now. It will lose value at a rate of 2% every 2 years. How much will the house be worth in 10 years?

Which function models this situation?

• y = 100,000(2)¹⁰

• y = 100,000(1.02)²

• y = 100,000(0.98)⁵

• y=100,000(0.98)¹⁰

The following function represents a bank account.

g(x) = 200(1.25)^x

What is the rate the bank is paying?

*Remember the rate is added or subtracted to 1 inside parenthesis*

• 200%

• 125%

• 25%

• 2%

Write an equation that models the following situation:

Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week. How much hair will she have after 6 weeks?

• y=6(0.14)⁶

• y=6(114)⁶

• y=6(1.14)⁶

• y=6(0.86)⁶

The following function represents a bank account.

g(x) = 200(1.25)^x

What was the initial dollar amount put in the bank?

• $200

• $1.25

• $0.25

• $2.00

Which of the equations below represent this table?

• y=3⋅(36)^x
• y=36⋅(3)^x
• y=3⋅(⅓)^x
• y=36⋅(⅓)^x

Tags

CCSS.HSF.LE.A.2

While in 6th grade, Heather invested $20 in a bank account that paid 6% in annual interest. Which equation could be used to find the balance of her account in 7 years?

• y = 20(1.06)⁷

• y = 20(0.06)⁷

• y = 20(6)⁷

• y = 20(0.16)⁷

You invest $400 for 5 years and the interest rate is 4.29% each year. 

• y=400(1 - 0.0429)⁵
• y=400(1+.0429)⁵
• y=400(1+ 4.29)⁵
• y=400e^0.049*5

Tags

CCSS.HSA.SSE.A.1

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.B.5